Improved machine for ornamenting jewelry, plate,-gc



y give an attractive tinish to plain surfaces.

. One of the branches of the engrave'rs trade 4is technically called 1frosting,7 and consists in cutting upon a plain surface, with the ed gellirlfinvrN truc cannon s. BARMENTER, or PROVIDENCE, nnonnrstnnn.

AnmPa'ovED MACHINE Foa 'oaN'AMEN-rme JEWELPQ/RLATEjaeQ Specificationforming part of Letters Patent No, L 17,853,.dated May 23, 1865.

' To ZZ'n/hom it concern! Be it knownthat I, ORANGE SPARMEN- TER, of thecity and county otfProvidence', in

the State of lthode Island, have-invented a. new and useful MachineforOrnamentingJ ew-l elry, Plate, and similar'articles; and I do vherebydeclare 'that' the. followingV specifica- Y tion, taken in connectionwith the drawings,

making a part of the-same, is afull, clear, and exact descriptionthereof. Y

Fig'. l is a view of the machine i'n perspec! tive, Figs. 2, 3, and 4are detailed parts, to

be referred to hereinafter.

The art of the engraver is inseparably connectedwith that of themanufacturing jewel 'er. It is uponV `the 'former that reliance is hadfor the eii'ects ot' light and shade, which 1n the best aswell as thecheapest,'art icles of manufacture of this class 1 are relied uponto ofa graver, which may be varied in shape vso astoexh1bit differenteffects, a combination lor" lines of the length of the cutting-edge of.the tool alternatelyl connected at the ends and making greater or lessan gleswith each other,

- as desired. c d This class of engraving is much ,used for makingornainentalborders for Nthe largerI articles of, jewelry, Vfor which `itis'suitable-- as, for instance, 'the buckles forladies waist`` beltsandis also .much used for lling upthe spaces within the-.outlines ot'engraved gures or designs in\ many varieties of manu.

factures of metals. Heretofore this Workhas been done exclusively byhand-labor,4 and is eii'ected by imparting a .peculiar wriggling 'motionto the grav/eras it is'- bythe force of thearm carried along the surfaceof the article 'to be engraved. yThe operation is neces sarily a tediousand wearying one, involving a great strain, particularly upon themuscles 'of the forearm and 'side and upon the cords of the wrist. o

The purpose of my `machine is to accomplish'thesame result whichy is nowperformed, by hand, and without the exercise of any greater manualdabrthan that necessary to .press thc piece to be frosted 'against thegraver,

and move the same along as the tool performs its work.-

In the accompanying drawings, A is a shaft, which is mounted in bearingsin suitav-ble''standards B'B. Upen this shaft'is a driving pulley, C,and upon., one end,whieh extends beyond the bearings, is the crank, D..This crank should be slotted, as shown, orhy some equivalentlmeansarranged so that a greater or less are of vibration-will be givento the arrnE of the rocker-shaft F,

with which, by theshackle-bar E', it is cnn- Figs. 2 and 3 are figuresshowing the maximum and minimum arcswhich will bede-V scribed by the endof the arm E when the crank D is adjusted, in the oneease -for itsgreatest, and in the other for its least, amount ot throw. The-'shaft Fis also mounted in suitable bearings upon standards G G.

Uponv the extremity opposite to that on which the arm E is fixed Ais asuitable socket, H, or holder for -th'e graver I.

lt isfobviousfthat inasmuch as the arm E i lis longer than the crank D,avibratory motion will he imparted to it and the shaft F.

an'd the graver 'I as the crank revolves,

and which `extent of vibration can be regulated, as above described.Themotion Vso obtained is the one-which, by the action of theewrist, -isgiven to the tool when'held in the hand; butin order that the effectsshall be'the same, it is essentially necessary that the 'socket ortool-holder H should be so arranged that when the graver is adjusted inplace the line of the cutting-edge ofthe 4graver shall be in a planethrough the axis of the shaft F, as shown -in Fig. 4; otherwisethegraver will b e scraped over the surface of the metal, and blur insteadof sharply cutting it. j

The ,work to be engraved is placed upon a holding-block 'and is held bythe operator up to the lgraver and guided in the direction which it isdesired the tool shall cut.

J represents a convenient form ot holder I. and guide to be used whenvstraight borders are to be engraved, and various other terms of guidesfor engraving upon curved lines'cau be readily imagined; but, except forstraight' borders, which it is desired to -liave `at a uni-

